.lin{
    background: red;
    color: white;
}

.lin_box{
    width:300px;
    height: 500px;
    border:1px solid lightseagreen;
    border-radius: 5px;
}
.lin_screen{
    text-align: center;
    padding:10px;
    margin:10px 0;
}
.lin_btn{
    text-align: center;
}
.lin_btn button{
    width:100px;
    height: 50px;
    border-radius: 3px;
    background: lightblue;
    border:none;
    outline:none;
    margin:0 10px;
}